& (1) & (2) & (3) & (4) \\
\textbf{Placebo year = 1969} & \multicolumn{1}{c}{Economic index} &  \multicolumn{1}{c}{Interest index}  &  \multicolumn{1}{c}{Participate index}  &  \multicolumn{1}{c}{Checks on pres} \\  \midrule
Post $\times$ Intensity&   -0.001         &    0.031         &   -0.012         &   -0.007         \\
                &  (0.023)         &  (0.065)         &  (0.056)         &  (0.048)         \\
\midrule
Observations    &     3045         &     3045         &     3045         &     3019         \\
DV Mean         &    0.388         &    1.601         &    0.831         &    1.205         \\

\midrule \\ \textbf{Placebo year = 1974} & \multicolumn{1}{c}{Economic index} &  \multicolumn{1}{c}{Interest index}  &  \multicolumn{1}{c}{Participate index}  &  \multicolumn{1}{c}{Checks on pres} \\  \midrule
Post $\times$ Intensity&    0.077\sym{***}&    0.029         &   -0.026         &    0.003         \\
                &  (0.025)         &  (0.052)         &  (0.061)         &  (0.050)         \\
\midrule
Observations    &     3466         &     3466         &     3466         &     3439         \\
DV Mean         &    0.390         &    1.589         &    0.786         &    1.194         \\
